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CVE-2025-55317

25
FAUCET Score

CVE-2025-55317 is an improper link resolution vulnerability in Microsoft AutoUpdate (MAU) that allows a local, authorized attacker to elevate privileges. With a CVSS score of 7.8 (HIGH), this flaw could lead to high impact on confidentiality, integrity, and availability if exploited. There is currently no public exploit code (Metasploit, Nuclei, ExploitDB) and it is not listed in CISA's KEV catalog, indicating no active exploitation. However, it has garnered some community discussion and media coverage, suggesting awareness within the security community.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.80CPE matchmatch criteria
cpe:2.3:a:microsoft:autoupdate:*:*:*:*:*:macos:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.39%
Probability of exploitation in next 30 days
EPSS Percentile
31.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0039 is in the 70th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc
Product: Microsoft AutoUpdate for MacFixed in: 4.80
View patch
microsoftvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

microsoft2025-Sep/CVE-2025-55317Important

Microsoft AutoUpdate (MAU) Elevation of Privilege Vulnerability

Sep 9, 2025

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2025-55317
Vendor Advisory